Dynamo-electric machine



(No Model.)

0. F. WINKLER. DYNAMO ELEOTRIC MACHINE.

No. 433,557. Patented Aug. 5, 1890.

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UNITED STATES PATENT ()FFIGE.

CHARLES F. IVINKLFR, OF TROY, NEWV YORK.

DYNAMO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 433,557, dated August 5, I890.

Application filed May 9, 1890- Serial No. 351,140. (No model.)

To aZZ whom it may concern:

Be it known that I, CHARLES F. WINKLER, a citizen of the United States, residing in Troy, in the county of Rensselaer and state of New York, have invented certain new and useful Improvements in Dynamo-Electric Machines, of which the following is a specification.

My invention relates to armatures for dynamo-electric machines, the object being the production of an armature, the construction of which is strong, cheap of manufacture, and eflieient in operation.

The invention consists in the details of construction, which will now be described with reference to the accompanying drawings, in which Figure 1 represents a perspective view of an incomplete armature. Fig. 2 is a transverse section of the armature. Fig. 3 is a perspective view of a port-ion of amodified form, and Figs. 4 and 5 are details.

A represents the armature-shat t.

B B represent two bronze disks constituting the heads of the armature. At their centers they are formed with hubs or sleeves Z) Z), embracing the shaft and extending from the inner side of the disks only. The perimeter of each disk has a flange b, extending outward or parallel to the shaft, forminga recess in the outer sides of the disk, the purpose of which will appear later on. Perforations b or skeleton work of any kind may be formed in the disk to admit air to the interior of the structure for purposes of ventilation.

The coils or conductors of the armature consist, in this instance, of metallic bars or strips of a comparatively large cross-section, so that they are more or less stiff or rigid. The coils are therefore made in sections and riveted or otherwise secured together at the joints. As here shown, each coil consists of two parts, a U-shaped portion 0 and a straight portion 0'. The turns in the part c are made square, and the base rests upon the hubs b, the sides against the disks, and the outer ends, which are bent over, upon the flanges 1).

straight portions 0 are laid across from disk to disk and upon the short bent-over ends of the part 0, thus forming the complete coils. Insulating material-such as mica, asbestus, or paper-is interposed between the parts at the proper places. The joints are secured together by means of bolts '01 rivets passing through the ends of the parts of the coils and the flange b. If bolts are used, the nut is placed on the inner end and bears against the inner side of the flange, as shown, where it will be out of the way. The connections to the commutator are made by means of thin tlat strips, which are placed between the joints of the coils and secured by the same bolt which joins the parts of the coils. This is shown at d.

The coils maybe of any desired conducting material. c iently large to carry the current without too great resistance, and may therefore be large enough to serve as the magnetic path of the lines of force betweenthe field-magnetic polepieces. If, however, it is desired to additionally strengthen the structure and at the same time to provide a freer magnetic circuit through the armature, the annular space inside the coils may be filled with iron wire, as shown in Fig. 2, which is wound on before the parts 0 of the coils are put in place. This wire will aid in holding the coils in place. The holes are bored longitudinally through the hubs h b to admit airinside the armature.

In the modification shown in Figs. 3 to 5 the coils are made up of wide thin flat strips, which are overlapped upon each other, and the straight part c is folded at each end, so as to form a right-angled projection, which may be placed between the overlapping ends of the parts 0. Insulation should, of course, be properly used at the joints.

In some of the patents heretofore taken out by me, I have described armatures with two entirely separate circuits. I propose to use two circuits on the armature herein described also. The part so far described will constitute a frame and a magnetic core upon which the second circuit or conductor is wound. This circuit is wound after the plan of a drum or Siemens windingthat is, longitudinally upon the core and across the heads. A section of this Winding is shown in Fig. 2. I therefore utilize both the Gramme and Sie- If of iron, they are made s'ufti-.

mens form of winding; but Ido notlimit my self to two circuits on the armature, as it is obvious that more than two may be employed. The holes in the heads B, through which the rivets or bolts of the bars pass, are to be properly provided with insMating-bushings.

Further modifications may be made within the limits of myinvention. Forinstance, the disks B B are above referred to as bronze; but they may be of any other non-magnetic metal, and instead of employing the separate strips dthe outer strips or bars a may have their ends long enough to extend over the disks and connect electrically with the commutator. Furthermore, the disks B B, instead of being separate from each other, may be cast in one piece with the shaft A or with a hollow shaft to be carried by shaft A.

In the form shown in Fig. 2, wires will connect the inside winding with the commutator, andinstead of bolts and rivets for the bars or strips 0 c, as described, said bars or strips may be secured to the disks by solder and by a band secured around the periphery.

A cover sleeved on the shaft and Secured to the disk may be employed to protect the heads of the armature.

Having thus described my invention, 1 claim- 1. In an armature for dynamo-electric machines, two disks or heads having inwardlyprojecting hubs, in combination wit-h rigid coils of general rectangularshape, one side of the coils resting upon and supported by the hubs, substantially as described.

2. In an armature for dynamo-electric machines, two disks or heads having inwardlyprojecting hubs and outwardly-projecting rim-flanges, in combination with rigid coils of general rectangular shape and having out- Wardly-projecting lugs from their upper or outer sides, the said lugs resting upon the rim-flanges and the inner sides of the coils resting upon the said hubs, substantially as described.

3. The combination, with the shaft and disks having inwardly-extending hubs, of the rigid coils resting upon the hubs, and awinding of iron wire located inside the coils and holding them against the hubs for increasing magnetic conductivity.

4. The combination with the disks having rim-flanges, of the rigid coils having outwardly projecting lugs resting upon the flanges, and bolts passing through the lugs and flanges, as described.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

CHARLES F. WINKLER.

Witnesses:

Gno. M. PAYFER, EUGENE L. MERCHANT. 

